build: Fix service and conf file quotation

The previous commit broke the autotools generation of D-Bus configs as
the strings being written into the XML were not correctly quoted.

Change-Id: Icf7ecbbd4ecd7f513721a578b8374df3ffae9649
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/xyz.openbmc_project.Network.conf.in b/xyz.openbmc_project.Network.conf.in
index 6d10a3c..b34fe6c 100644
--- a/xyz.openbmc_project.Network.conf.in
+++ b/xyz.openbmc_project.Network.conf.in
@@ -2,7 +2,7 @@
         "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
 <busconfig>
         <policy user="root">
-                <allow own=@DEFAULT_BUSNAME@/>
-                <allow send_destination=@DEFAULT_BUSNAME@/>
+                <allow own="@DEFAULT_BUSNAME@"/>
+                <allow send_destination="@DEFAULT_BUSNAME@"/>
         </policy>
 </busconfig>